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What is NOT true with pre shared key authentication within IKE / IPsec protocol?
Correct Answer: B
Explanation/Reference: Explanation: A pre-shared key is simply a string of characters known to both parties. When configuring a VPN using IPSec with pre-shared keys for authentication, the pre-shared key is entered into the configuration of the VPN device at each end of the VPN. IKE can use certificate-based authentication using certificates from a PKI or it can use pre-shared keys. When using pre-shared keys, you do not need a PKI. Incorrect Answers: A: It is true that pre-shared key authentication is normally based on simple passwords. C: It is true that IKE is used to setup Security Associations. D: It is true that IKE builds upon the Oakley protocol and the ISAKMP protocol. References: https://en.wikipedia.org/wiki/Internet_Key_Exchange